Business law – Provide a memo to a manager who has to promote

In 400-500 words, provide a memo to a manager who has to promote an employee. One employee is male and one is female. Both have similar length of time on the job and their work history is of similar quality, though the male employee has more education and experience. The manager consistently makes crude jokes about women. Provide any legal suggestions to ensure that the manager is not guilty of discrimination if he chooses to promote the male employee.